Photographic-plate holder



(No Model.)

B. R. BULLARD. PHOTOGRAPHIG PLATE HODER.

Patented Nov. 7, 1893.

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y UNITED t' STATES PATENT OFFICE.

EDGAR R. BULLARD, OF WHEELING, WEST VIRGINIA.

PHOTIOGRAPHiC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 508,204, dated November7, 1893.

Application filed July 7, 1891. Serial Nol 398.676. (No model.)

To all whom it may concern.-

Be it known that I, EDGAR R. BULLAED, a citizen of the United States,residing at Wheeling, in the county of Ohio and State of West Virginia,have invented or discovered certain new and useful Improvements inPhotographic Plate or Film I-Iolders, of which improvements thefollowing is a specification.

The invention described herein relates to certain improvements inphotographic plateF or film holders, and has for its object aconstruction'whereby the method of insertion and removal of thesensitive plate or film is greatly facilitated.

In general terms, the invention consists of a suitable holder providedwith a lever catch, so arranged as to retain the plate or film inposition, and to be conveniently operated from the outside,substantially as more fully hereinafter described and claimed.

In the accompanying drawings forming a part of this specification,Figure lis a perspective view of my improved holder, one of the slidesbeing partially removed. Fig. 2 is a sectional view on the line al, Fig.1, and Fig. 3 is a detail View of one of the retaining catches.

As regards its general features the holder may be constructed in theusual or any suitable manner, and consists of the frame 1 and thecentral partition 21having its edges secured in grooves formed in theinner walls of the sides 3 and end pieces 4c and 5 of the frame, asshown in Fig. 2. Through the end piece 4 are formed slots for the slides6 which move in grooves in the sides 3, and enter when closedthe groovesin the end piece 5. In order to prevent the entrance of light throughthe slots in the end 4 when the slides are withdrawn, any suitable formof light excluding shutter or curtain known in the art may be employed.

If desired springs 10 may be attached to the back board 2 for forcingthe lower portions of the plates or films l1 outward so as to facilitatethe removal of the sensitive plate or film from the holder. In order toprevent the sensitive plate from dropping out or being forced out of theholder by the spring l0 when used, on the withdrawal of the slide Iarrange levers or pivoted catches 8 in longitudinal recesses 9 in theopposite sides of the end piece or cross-bar, 5, said levers or catchesbeing provided at their inner ends with lugs or projections l2,projecting up through small slots or transverse recesses into theinterior of the frame so as to engage the lower edges of the plates orfilms, while their outer 4ends are accessible to the ngers of theoperator. These levers or catches are held so that the engaging lugs l2Will project through their slots, by springs, which are preferably madein the form of a spiral as shown at 13, and interposed between a presserplate 14 formed on the outerend of theA catch or lever and the bottom ofthe recess or notch in which the presser plate works. As shown a leveror catch is provided for each plate in case of a double holder, so thatone may be removed without interference with the other. In order toprevent any twisting or straining of the lever or its pivot pin it ispreferred to form the lever with auxiliary arm 18 extending a littlebeyond the pivotal point of the lever, and connected to the outer end ofthe lever. This auxiliary arm is constructed to tit in the recess on theopposite side of the end piece or cross-bar 5 from that on which itslever is placed, thereby inclosing the wall formed by the recesses inthe said crossbar 5, as shown in Fig. 2, the pivot passing through saidwall and having the lever and itsarm mounted in its opposite ends. Thiscatch serves to hold the lower portions of the plates or films, theirupper edges being held by grooves 7 on the top bar, and vcan be easilywithdrawn from engagement therewith, the finger of the operator pressingon the plate ll, which is located, as shown, wholly within the frame,and is not therefore liable to be accidentally shifted, and as there isno projection beyond the periphery of the frame, the improved holder'canbe readily used in box cameras.

It will be readily understood that while it is preferred to arrange thecatch on the bottom piece of the holder it can also be placed on theside.

I claim herein as my invention- 1. In a photographic plate-holder, thecombination, with the cross-bar having a main longitudinal side recess,a transverse recess leading from the said longitudinal recess into theinterior of the frame, and a notch formed in the outer edge of saidcross-bar near one end, of the lever pivoted lengthwise Within said siderecess, having a lug or projection at one end operative within the"transverse recess, and a presser-plate at the other end titting Withinthe said notch and held normally flush With the outer face of the frame,and a strip to cover the recess and lever, as and for the purpose setforth.

2. In a photographic plate-holder, the coinbination with the cross-barhaving each of its sides provided with a main longitudinal recess with atransverse recess leading therefrom into theinteriorot` the f rame, anda, notch formed in the outer edge of said cross-bar near each end, ofthe levers pivoted length-

